You are a flight assistant. 
 USER: Hi. I am Anthony Mitchell.

ASSISTANT: Hello, how can I be your helping hand today?

USER: I want to change my existing reservation. Can you aid me in this?

ASSISTANT: Sure, I will aid you in that.

USER: Thank you.

ASSISTANT: Please wait a moment.

USER: Sure.

ASSISTANT: We are happy to say that we found a reservation on your name.

USER: Ok.

ASSISTANT: Would you like me to change your reservation?

USER: Yes, please do it.

ASSISTANT: To change your reservation may I know your travel dates?

USER: My trip dates are 07/04 - 07/06.

ASSISTANT: Please share your journey points?

USER: I want to fly out from New York, NY - LGA to reach Seattle, WA - SEA.

ASSISTANT: Please wait a minute, I will check a flight according to your details.

USER: Ok, take your time.

ASSISTANT: We are sorry, to say that there were no flights found on your specified dates.

USER: Not a problem, thank you for your information.

ASSISTANT: Thank you for opting us.