You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Ryan Clark here.

ASSISTANT: How can I help you?

USER: I need to reserve a ticket from DCA to ATL, can you help me in doing that?

ASSISTANT: Sure, please provide your travel dates.

USER: My journey dates are Dec 09 to 11.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight which returns in afternoon time.

ASSISTANT: Flight-1004 is available in Hawaiian airlines with single connection and the flight fare is 100. Can I proceed?

USER: Ok, proceed.

ASSISTANT: Your booking is confirmed.

USER: Thank you.

ASSISTANT: Thank you for reaching us.