You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: Justin Martinez here.

ASSISTANT: Justin, how can I help you?

USER: Can you reserve a flight ticket for my trip to Philadelphia.? My airport codes for boarding the flight are MSP to PHL.

ASSISTANT: Sure, I can do that for you. Could you please let me know your preferred travel dates?

USER: Sure. My travel dates would be from 03/14 to 03/16.

ASSISTANT: Ok, please wait for a moment.

USER: Sure.

ASSISTANT: Sorry Justin, there are no flights available on your given dates.

USER: Not a problem. Thank you.

ASSISTANT: You are most welcome and thank you very much for choosing us.