You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How should I assist you at this moment?

USER: Joshua Campbell here.

ASSISTANT: Glad to meet you Campbell.

USER: I would like to go Detroit for my business meeting, can you please help me to book a flight ticket?

ASSISTANT: Sure, I will help you with booking.

USER: Thank you.

ASSISTANT: Can I have your travel dates please?

USER: Sure, I am heading from my location on 06/13 and I would like to book a return ticket on 06/15.

ASSISTANT: Ok, please provide me airport codes of your journey locations.

USER: My boarding is from HOU and destination airport code is DTW.

ASSISTANT: Ok, please wait a minute, I will get back to you with flight details.

USER: Sure, take your time.

ASSISTANT: Thank you for waiting with patience. Sorry Campbell, no flight is available to you on your dates.

USER: Oh, so sad to hear. Anyways, thank you for the information.

ASSISTANT: Most welcome. Thank you for choosing us.