You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello, how may I serve you today?

USER: I am Jessica Robinson. Can you please help me in booking a flight ticket from SFO to DFW?

ASSISTANT: Sure, may I know your dates of journey please?

USER: Sure, my journey dates are Sept 27 and Sep 29.

ASSISTANT: May I know class preference please?

USER: I need to travel in economy class.

ASSISTANT: Do you have any other specifications please?

USER: I need a flight with single connection.

ASSISTANT: There is a light with the connecting flight of fare 200 of JetBlue airline, are you ok with this booking?

USER: May I know the depart time?

ASSISTANT: Yes, the depart time is at 2:00AM.

USER: I have to depart in the afternoon time, can you please check with it?

ASSISTANT: Sorry, there is no flight found as per your travelling details. Thank you.