You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I render you at this moment?

USER: My name is Mark Garcia, I want to book a direct flight from LAS to attend a marriage, can you help me with booking?

ASSISTANT: Sure, do you need any halt in between the journey?

USER: I have already mentioned.

ASSISTANT: Ok, may I know your preferred travelling dates?

USER: I will fly on Nov 10 and return on Nov 12.

ASSISTANT: Ok, please share your source airport code.

USER: My destination airport code is DFW.

ASSISTANT: Ok, please wait for few minutes.

USER: Sure.

ASSISTANT: There are no flights found on your requested dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thank you for reaching us.