You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I provide assistance to you?

USER: Can you help me in booking a flight ticket form IAH to SEA?

ASSISTANT: Sure, may I know your good name please?

USER: I am Nicholas Lopez.

ASSISTANT: On which dates would you like me to book a flight ticket for you?

USER: I want to travel on 12/26, and return on 12/28.

ASSISTANT: Is there any connection limit for you?

USER: I need a connecting flight.

ASSISTANT: Do you have any other specifications to be met?

USER: I want to return in the evening time.

ASSISTANT: Sorry to say that, there are no flights available on the routes of your journey.

USER: No problem, thanks for the information.

ASSISTANT: Thank you for reaching us.