You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: My name is Sarah Adams.

ASSISTANT: How can I assist you?

USER: I would like to travel from IAD to DEN to meet my father, can you help me for booking?

ASSISTANT: sure, can you please share your trip dates?

USER: My travelling dates are from 12/11 till 12/13.

ASSISTANT: Please wait a moment.

USER: Make sure that my connection limit should be 1.

ASSISTANT: Sorry, no flights are available on your route.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome.