You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I assist you today?

USER: I made a reservation earlier in normal cost airline but now I want to change my airline to low cost to save some money.

ASSISTANT: Sure, I am mirthful to help you that. Please provide me your name.

USER: Thank you. I am Dorothy Robinson.

ASSISTANT: Happy to inform you that, I found your reservation. Can you please share me your travelling airport codes?

USER: I will fly from HOU to reach MSP.

ASSISTANT: On which dates you want me to book your dates?

USER: My trip dates are July 07 and July 09.

ASSISTANT: Do you have any specification?

USER: I need a connecting flight.

ASSISTANT: Sorry, no flights are available on your preferable travel dates.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for choosing us, have a nice day.