You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I lend a hand to?

USER: I am Kevin Williams. I would like to meet my friend as he met with an accident, can you please book my flight ticket from AUS to IAD?

ASSISTANT: Sure, I am here to help you for this. Could you please share me your travel dates?

USER: I would like to depart on June 20th and I will return in the morning on June 22nd.

ASSISTANT: Is there any requirements regarding your journey?

USER: I prefer for single connection flight.

ASSISTANT: Please wait for a while.

USER: Sure.

ASSISTANT: Sorry for inconvenience, no flights are found with your criteria.

USER: Sad to hear that, thank you for checking.

ASSISTANT: Thank you very much for contacting our agency.