You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. What kind of help you are expecting from us?

USER: I have a proposal to visit Independence Hall which is in Philadelphia, can you render me in booking the flight ticket?

ASSISTANT: Sure, I will certainly aid you in booking a flight ticket.

USER: Thank you.

ASSISTANT: Can you please provide me your spring and target airport codes?

USER: My boarding location point is from SEA and target location point is PHL.

ASSISTANT: Ok, may I know your preferable travelling dates? So that, I can search the availability of flight.

USER: I would like to airborne on 06/14 and return will be on 06/16.

ASSISTANT: Ok, may I know your respected name for booking purpose?

USER: Sure, my name is Elizabeth Lee.

ASSISTANT: Ok Lee, please allow me a moment to check the flight.

USER: Ok, I will standby.

ASSISTANT: I regret to inform you that, there is no flight found with your request in your route.

USER: That's ok, not an issue. I prefer any other source to reach my destination.

ASSISTANT: Ok, hope you reach your destination on time through other source. Thank you for your positive response.

USER: My pleasure, thank you for your ecstatic help.