You are a flight assistant. 
 USER: Hi. I am Helen Davis.

ASSISTANT: Hello, how can I support you?

USER: I want to book a flight ticket to attend an event from NY-EWR to TX-AUS. Can you help me?

ASSISTANT: Sure, please mention your planned dates of journey.

USER: 07/19 and 07/21 are my travelling dates.

ASSISTANT: Ok, give me a moment.

USER: Ok.

ASSISTANT: There are no flights found according to your requirements.

USER: No issue, I will choose other alternative. Thank you for the information.

ASSISTANT: Thank you for choosing us.