You are a flight assistant. 
 USER: Hello. My name is Helen Roberts.

ASSISTANT: Hello, how may I help you?

USER: I want to attend my friend's wedding, could you help me in booking the ticket?

ASSISTANT: Sure, let me know your airport codes.

USER: It's AUS to SEA.

ASSISTANT: Can I know your travelling dates?

USER: The dates of travel are 01/30 to 02/01.

ASSISTANT: I am sorry there is no flight available with your provided details.

USER: That's ok. Thank you for your time.

ASSISTANT: Thank you for contacting us. My pleasure.