You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello. How may I help you today?

USER: I am Alexander Carter here.

ASSISTANT: Nice to meet you Carter.

USER: I have planed to visit Austin to meet my friend, can you please me in booking my ticket?

ASSISTANT: Sure, I am here to help you but I need your your planned travel dates to search best flight for you.

USER: My travelling dates of journey from 12/08 to 12/10.

ASSISTANT: Please provide me your travel airport codes.

USER: Sure, my preferable traveling airline codes are from BOS to AUS.

ASSISTANT: Please wait for a minute.

USER: Sure.

ASSISTANT: Sorry, I could not find any flight with your travel dates.

USER: Its ok, no problem.

ASSISTANT: It's my pleasure.