You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How can I assist you today?

USER: I am Jeffrey Hernandez.

ASSISTANT: Nice to meet you.

USER: Can you help me to book a flight ticket from HOU to SEA?

ASSISTANT: Sure, I can help you with that. May I know your travel dates please?

USER: My travelling dates are 02 and 04 of Apr.

ASSISTANT: May I know your class preference please?

USER: No.

ASSISTANT: Do you have any time concerns?

USER: I would like to return in the evening.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Sorry to say that there are no flights available for you on those dates with your given details.

USER: It's ok, not a problem, thank you.

ASSISTANT: Thank you for choosing us.