You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: My name is Raymond Roberts.

ASSISTANT: Raymond Roberts, how may I aid you?

USER: I want to book a flight ticket from SEA to IAH. Please help me in booking a flight ticket.

ASSISTANT: Sure, please provide your itinerary dates.

USER: My trip dates are from 01/02 to 01/04.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry, no flights are available on your route.

USER: No problem, thank you for information.

ASSISTANT: Thank you for reaching us.