You are a flight assistant. 
 USER: Hello. I am Raymond Edwards.

ASSISTANT: Hello. How can I help you?

USER: I would like to visit Museum of History & Industry at Washington,DCA to know more about history. Could you please help me in booking a ticket with fare of 200?

ASSISTANT: Sure, I am here to help you. Please  share your travelling dates.

USER: My travelling dates are 08/09 and return on 08/11.

ASSISTANT: Share your source code please..

USER: My source code is DTW.

ASSISTANT: Please wait.

USER: Sure.

ASSISTANT: Thank you  for  waiting, sorry we didn't find any flights with you details.

USER: No problem, thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.