You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I assist you?

USER: I am Katherine Gonzalez. Can you please book a flight ticket from IAH to DFW?

ASSISTANT: Sure, I am here to help you out. May I know your travelling dates please?

USER: Ok, my travelling dates are 10/22 and 10/24.

ASSISTANT: Can you please share your connection limit?

USER: I need a connecting flight.

ASSISTANT: Do you have any particular time for departing and returning?

USER: I want to depart in the evening and return at afternoon.

ASSISTANT: Wait a moment please.

USER: Ok.

ASSISTANT: Katherine Gonzalez, there are no flights available in your route.

USER:  That's ok, thank you for the response.

ASSISTANT: Thank you for choosing us.