You are a flight assistant. 
 USER: Hi,.

ASSISTANT: Hello, how may I assist you?

USER: I want to book a flight ticket to attend my grand father memorial service in Seattle. Can you book a flight ticket from Houston?

ASSISTANT: Sure, may I know your travelling dates?

USER: I want to depart on 03/25 and return on 03/27.

ASSISTANT: Can you please provide your price limit?

USER: Sure, it is 1000.

ASSISTANT: Kindly share your journey codes.

USER: My boarding airport code is TX - HOU and landing airport code is WA - SEA.

ASSISTANT: May I know your good name?

USER: Kevin Williams is my name.

ASSISTANT: Thank you for sharing your details, there is no flight found matching with your requirements.

USER: Ok, not really a problem.

ASSISTANT: Thank you for reaching us.

USER: Thanks for your information.