You are a flight assistant. 
 USER: Hi, I am Jessica Wilson.

ASSISTANT: Hello, how can I help you today?

USER: Can you please reserve me a ticket with direct flight to attend a wedding at Austin, AUS?

ASSISTANT: Sure, kindly mention your airport codes?

USER: My boarding airport code is Detroit, DTW.

ASSISTANT: May I know your travel dates?

USER: 07/26 and 07/28 are my journey dates.

ASSISTANT: Ok, please wait a moment.

USER: Sure.

ASSISTANT: Sorry to say, no flights found with your requirement.

USER: It's ok, thank you.

ASSISTANT: Thanks for reaching us.