You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how can I help you?

USER: I would like to book a ticket from 19/30 to 10/02 with the name Christopher Parker. Please help me with booking.

ASSISTANT: Sure, please share me your airport codes?

USER: Its from HOU to SEA.

ASSISTANT: Thanks for providing your details. Sorry, to inform you that there is no flight found with your requirement.

USER: Fine, thanks for the information.

ASSISTANT: Thank you.