You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you at this moment?

USER: Can you please book a flight ticket to SEA from IAH?

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

USER: My trip dates are 10/07 and 10/09.

ASSISTANT: Ok, please tell me your preferences related to airlines.

USER: I prefer normal cost airlines.

ASSISTANT: Ok, could please tell me your full name for the documentation purpose?

USER: Nicole Collins here.

ASSISTANT: Ok, please give me a minute.

USER: Sure.

ASSISTANT: Sorry to inform you that, there is no flight found with the details you have provided to me.

USER: That's ok, thanks for checking.

ASSISTANT: You are welcome. Thank you for reaching us.