Hi.
user
Hello.
assistant
I am Jonathan Hall.
user
How can I  help you?
assistant
Can you help me in booking on Aug 15 to Aug 17, as there is a conference meeting to attend?
user
Sure, may I know your airport codes please?
assistant
My source is LAX and destination is IAD.
user
I am sorry no flights found on your route.
assistant
No issue, thank you.
user
Thank you for choosing us.
assistant