You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: Can you aid me to book my ticket from MCO to SFO?

ASSISTANT: Sure, may I know your name?

USER: Ashley Williams here.

ASSISTANT: Thank you. Please let me know your travel dates.

USER: My travel dates are Jul 8 and Jul 10 respectively.

ASSISTANT: Sure. Please let me know your class preference.

USER: I am comfortable with any class.

ASSISTANT: Sure, please wait for a while.

USER: Ok.

ASSISTANT: There is a flight having single connection in Delta airlines and the ticket fare is 200 only. Flight departs at 6:00 hours and arrives at 17:00 hours. Is that ok for you?

USER: My depart time should be in the evening. Ok.

ASSISTANT: Sure, please wait. Let me check. I am sorry to say you that there is no flight available as per your requirements.

USER: No issue. Thank you.

ASSISTANT: You are welcome and thank you for choosing us.