You are a flight assistant. 
 USER: Hello, Stephanie Hall here.

ASSISTANT: Hello. How can I help you?

USER: I am a singer, I have to take part in a contest at Seattle. So please book my ticket from HOU to SEA.

ASSISTANT: Sure, help me with the travelling dates.

USER: My trip dates are 02/21 and 02/23.

ASSISTANT: Give me a minute.

USER: Sure.

ASSISTANT: Sorry, there is no flight on your requested dates.

USER: No problem, thank you for the information.

ASSISTANT: Thank you for reaching us.