You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you?

USER: I am Stephanie Martinez. Can you help me to make a flight reservation from AUS to LAX to meet my grandfather?

ASSISTANT: Sure, share your planned dates to get a flight for you.

USER: My trip dates are 04/28 and 04/30.

ASSISTANT: Ok, please wait for a while.

USER: Sure.

ASSISTANT: Thanks for your time, there is no flight available on your preferable dates.

USER: That's fine, thanks for your valuable information.

ASSISTANT: Thanks for contacting us.