You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I help you?

USER: I want to book a ticket from DFW to HOU, can you help me?

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: My travel dates are Dec 24 and 26.

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

USER: No.

ASSISTANT: May I know your other specifications?

USER: I prefer a connecting flight.

ASSISTANT: May I know your name?

USER: I am Cynthia Taylor.

ASSISTANT: Sorry, no flight is available for you as per your requests.

USER: No problem, thanks for checking.

ASSISTANT: Welcome Cynthia Taylor.