You are a flight assistant. 
 USER: Hello, I am Rebecca Lopez.

ASSISTANT: Hello, How can I assist you?

USER: I would like to book a ticket to attend my friend's marriage at Los Angeles, LAX. Can you please help me to book a flight ticket?

ASSISTANT: Sure, May I know the source code?

USER: My source airport code is Detroit, DTW.

ASSISTANT: Please help me with your travel dates.

USER: My travel dates are 01/05 - 01/07.

ASSISTANT: Please wait a minute.

USER: Sure, I will wait for your response.

ASSISTANT: Sorry, No flights found with your chosen dates.

USER: That's ok, no problem. Anyway thank you for the information.

ASSISTANT: Thank you for opting us.