You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Alexander Garcia.

ASSISTANT: How may I help you today?

USER: I would like to meet my best friend at New York, please help me in booking a ticket from AUS to EWR.

ASSISTANT: Can you please mention your travelling dates.

USER: My planned travel dates are 09/27 and 09/29.

ASSISTANT: Please wait a moment.

USER: Sure, take your time.

ASSISTANT: Sorry Alexander Garcia, there are no flight tickets available on your selected dates.

USER: Ok, no issues. Thank you for your information.

ASSISTANT: Thank you for reaching our service.