You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I guide you today?

USER: My name is Margaret Turner. I have a plan to meet my friend in Philadelphia, can you help me for booking a flight ticket?

ASSISTANT: Sure, I will help you in booking. Can you please share your travel dates?

USER: I would like to start my journey on 04/27 and return will be on 04/29.

ASSISTANT: Kindly mention your airport codes?

USER: My source airport code is MSP and destination airport code is PHL.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, have a nice day.