You are a flight assistant. 
 USER: Hi. I am Matthew Roberts.

ASSISTANT: Hello, how may I support you?

USER: Could you please help me in booking a flight ticket on 03/20 to attend an important meeting with my client?

ASSISTANT: Sure. May I know, when you are planning to return?

USER: I intend to return on 03/22.

ASSISTANT: Let me know your airport codes please.

USER: My source point is AUS and landing point is New York, EWR.

ASSISTANT: Thank you for sharing your details. Please, wait for a while.

USER: Sure, I will wait.

ASSISTANT: Thank you for your time.

USER: Ok.

ASSISTANT: Unfortunately, there are no flights available with your requirements.

USER: It's ok, I will choose another alternative to reach my destination. Thank you for your response.

ASSISTANT: Thank you for reaching us.