You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Lisa Johnson.

ASSISTANT: How can I render you?

USER: I want to attend a sports event at New York, EWR.

ASSISTANT: Ok.

USER: Can you help me in booking on 07/19?

ASSISTANT: Sure, we are glad to aid you.

USER: Ok.

ASSISTANT: When you want to return?

USER: I will be return on 07/21.

ASSISTANT: To proceed further I need your source airport also.

USER: I am boarding at Austin, AUS.

ASSISTANT: Please, wait for a while I will check the flights and revert to you.

USER: Sure.

ASSISTANT: Thanks for waiting.

USER: Ok.

ASSISTANT: There is no flight found to your route.

USER: Ok, No issues. Thanks for the information.

ASSISTANT: Thank you for reaching us.