You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you?

USER: May I know if it is possible to change my existing reservation as I can not make the journey due to heavy snow fall?

ASSISTANT: Sure, I am here to help you.

USER: Thank you for the positive response.

ASSISTANT: May I know your name to check it?

USER: Ok, please check for the name Janet Martinez.

ASSISTANT: Please give me a time to check.

USER: I will wait for your response.

ASSISTANT: We found your reservation, can you please tell me your new airport codes?

USER: Ok, thank you for the information. Please amend the reservation to my planned origin airport code HOU and destination is EWR.

ASSISTANT: Can you help me with your travelling dates?

USER: Yes, I planned my journey on the dates Oct 2nd and Oct 4th respectively.

ASSISTANT: Do you have any pause in your journey?

USER: Ok, please book a single connecting flight.

ASSISTANT: May I know your class preference?

USER: Please book any class which is available.

ASSISTANT: Ok, do you have any other specifications?

USER: No.

ASSISTANT: We found a connecting airline of Frontier airline in the economy class with fare of 100, can I proceed for booking?

USER: No, please don't proceed as I do not prefer a low-cost airlines. Can you check for normal-cost airlines?

ASSISTANT: Ok, we found United airlines, can I proceed with this?

USER: Ok, please book it.

ASSISTANT: Your ticket has been confirmed with flight number 1029.

USER: Ok, thank you for amending my reservation.

ASSISTANT: Thank you for reaching us.