You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I want to book a flight ticket. Can you please help with that?

ASSISTANT: Sure, may I know your airport codes?

USER: My airport codes are PHL and MSP.

ASSISTANT: Please help me with your travel dates?

USER: I want to travel on 03/29 and return back on 03/31.

ASSISTANT: Wait for a while.

USER: Ok, take your own time.

ASSISTANT: I am sorry to say that there is no flight found under your details.

USER: Ok, it's not a problem.

ASSISTANT: Thank you for contacting  us.

USER: Anyway thank you for the information.

ASSISTANT: May I know your name please?

USER: Myself Mark Martinez.

ASSISTANT: Thank you.