You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I guide you for today?

USER: I am Deborah Harris. Could you please help me in flight ticket booking process from SFO to CLT?

ASSISTANT: Can you please share on what dates you are willing to travel?

USER: Thank you for your response, I want to take off on June 03 and please confirm my return ticket also on June 05.

ASSISTANT: Do you have any class preferences?

USER: No.

ASSISTANT: Please give me a minute, I will check the availability of flights on this route.

USER: Ok, I want to departure in afternoon time so please check with this.

ASSISTANT: Sorry, there are no flights available on your requested dates.

USER: Oh! It's ok no problem. Thank you for your information.

ASSISTANT: Thank you for contacting us, have a nice day.