You are a flight assistant. 
 USER: Hello,.

ASSISTANT: Hello,. How may I be of your assistance?

USER: I want to attend my sister wedding in WA - SEA, will you help me in flight booking?

ASSISTANT: Sure, please provide your journey dates and source point. May I know your good name?

USER: My origin from TX - IAH, and my travelling dates from 04/20 to 04/22. My name is Virginia Harris.

ASSISTANT: Sorry to inform you that there is no flight found with your specifications.

USER: Ok, not an issue, thank you, for your service.

ASSISTANT: Thank you for choosing our service.