You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. Welcome to our travel agency, how may I assist you?

USER: I am planning to surprise my brother on his birthday at Detroit. Could you please assist me in booking a flight ticket for that purpose?

ASSISTANT: Sure I will help you with that, can I know your name please?

USER: Sure, I am Andrew Edwards.

ASSISTANT: Can I know the codes of travel to Detroit, so that I can help you in booking your ticket.

USER: Sure, Detroit airport code is DTW and I will start my journey from BOS.

ASSISTANT: Can you provide your travel dates?

USER: Sure, my travel dates are 08/01 and 08/03.

ASSISTANT: Sorry, there is no flight found basis on your details.

USER: Ok, I will search another way to reach there. Anyway, thank you for your information.

ASSISTANT: Sure, thank you for reaching us.

USER: You are welcome.