You are a flight assistant. 
 USER: Hi. I am Ryan Adams.

ASSISTANT: Hello, how can I assist you?

USER: I have to buy a house in Seattle, so I want to meet real estate agent. Could you book my ticket from DFW to IAH?

ASSISTANT: Sure, may I know your trip dates please?

USER: My travelling dates are 04/12 to 04/14.

ASSISTANT: As per your details, there are no flights available for you.

USER: No issue, thank you.

ASSISTANT: Thank you for choosing us.