You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: Can you help me in changing my recent reservation?

ASSISTANT: Sure, can you please provide me your name?

USER: Sure, my name is Cynthia Perez.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: We have found a reservation by the name Cynthia Perez.

USER: Ok.

ASSISTANT: Could you please provide me with the new genesis and terminus airport codes?

USER: My airport codes are from LGA to PHX.

ASSISTANT: May I know the itinerary travel dates please?

USER: My travelling dates are from Mar 1 to Mar 3.

ASSISTANT: Is there any connection limit?

USER: I need a connecting flight.

ASSISTANT: May I know the class preference?

USER: I don't have any class preference.

ASSISTANT: Is there any airline preference?

USER: No.

ASSISTANT: Are there any more preferences you want to avail?

USER: No.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: Cynthia Perez, I regret to inform that there are no flights on your route with the given dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.