You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Emily Clark here.

ASSISTANT: How may I lend a hand to?

USER: I need to have a flight ticket from OAK to AUS for an important business meeting, can you please help me out with booking of a flight ticket on those locations?

ASSISTANT: Sure Clark, When you are willing to travel?

USER: I would like to start my journey on 12/29.

ASSISTANT: Just a moment.

USER: Sure.

ASSISTANT: Can you please share me your return dates?

USER: I would like to return on 12/31.

ASSISTANT: Clark sorry to intimate, no flights are available with your requirements.

USER: Oh! Sad to hear that. Anyway, I will contact another agency to go there. Thank you for the information.

ASSISTANT: You are welcome, thank you very much for contacting us.