You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I help you today?

USER: My name is Andrew Davis, I want to book a flight from Austin to Dallas to meet my friend. Can you help me with that?

ASSISTANT: Sure, I am here to help you with that. Can I know your travelling dates?

USER: I will fly on May 22 and return on May 24.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Ok, may I know your airport codes?

USER: I will fly from AUS to DFW.

ASSISTANT: Ok, wait for a minute.

USER: Ok.

ASSISTANT: Sorry to say that, there are no flight's available based on your travelling dates.

USER: Ok, thank you for the information.

ASSISTANT: Thank you for reaching us.