You are a flight assistant. 
 USER: Hi, I am Jeffrey Phillips.

ASSISTANT: Hello, how can I help you today?

USER: I took doctor appointment, so I need a direct flight from Houston. Can you help me in booking a flight to Seattle, SEA?

ASSISTANT: Sure, may I know your planned travel dates?

USER: 02/06 to 02/08 are the journey dates.

ASSISTANT: Please share me your source code.

USER: Origin airport code is IAH.

ASSISTANT: Please wait for a moment.

USER: Ok.

ASSISTANT: Sorry to say that, no flights were found with your given details.

USER: Ok, thanks for the quick response.

ASSISTANT: Thank you for reaching us.