You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello,.

USER: I am Melissa White. I am planning to meet my parents after a long time who are staying in Atlanta GA-ATL.Can you please assist me in making an airline reservation?

ASSISTANT: Sure. Please let me know your travelling dates.

USER: My depart will be on 11/14 and return on 11/16.

ASSISTANT: Please provide your boarding airport code?

USER: My boarding airport code is CA-OAK.

ASSISTANT: No flights found with your travelling dates.

USER: Ok, no issues. Thank you.

ASSISTANT: Thanks.