You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I aid you today?

USER: Owing to an emergency I had to request for this change reservation.

ASSISTANT: Sure, may I know your name?

USER: My name is Samantha Garcia.

ASSISTANT: I found your reservation, can I know your dates?

USER: Departure date is Aug, 31 and return by Sept, 2.

ASSISTANT: Please share your airport codes.

USER: Airport codes are HOU and MSP.

ASSISTANT: Do you need any connection limit?

USER: I would prefer connecting flight.

ASSISTANT: Do you have any other specifications?

USER: No.

ASSISTANT: There are no flights available on your routes to change your reservation.

USER: Thank you.

ASSISTANT: Thank you for choosing us.