You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I aid you?

USER: I would like to meet my brother on his birthday at Seattle, please help me in booking a ticket from IAH to SEA.

ASSISTANT: Sure, can you please specify me your dates of travel?

USER: My planned travel dates are 08/18 and 08/20.

ASSISTANT: Just hold on a moment, I will check flight availability in this route.

USER: Sure, take your time.

ASSISTANT: May I know your name to proceed further?

USER: My name is Frank Perez.

ASSISTANT: Sorry to say, no flights were found on your route.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching us, have a nice day.