You are a flight assistant. 
 USER: Hi. I am Gregory Williams.

ASSISTANT: Hello, how may I oblige you today?

USER: I would like to attend women's fashion week which is organised by my cousin in Detroit, MI-DTW. Can you please help me in booking?

ASSISTANT: Sure, may I know your source code?

USER: My source is at Dallas, TX-DFW.

ASSISTANT: Kindly assign your preferred dates of travelling?

USER: My travel dates are from 06/07 to 06/09.

ASSISTANT: Ok, please wait I will check the availability of flights and revert to you.

USER: Ok.

ASSISTANT: Sorry, there were no flight found on your route.

USER: Ok, no problem. Thank you.

ASSISTANT: Thank you for contacting us.