You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I assist you today?

USER: Can you book a flight ticket from SFO to HOU to attend a conference meeting?

ASSISTANT: Sure, may I know your planned travel dates?

USER: Feb, 12 and Feb, 14 are my planned travel dates.

ASSISTANT: Do you have any limits on number of connections?

USER: Yes, I prefer to travel in connected flight.

ASSISTANT: Do you have any airline preferences for  your journey?

USER: No, thanks.

ASSISTANT: May I know your name for the documentation purpose?

USER: Rachel White here.

ASSISTANT: Do you have any class specification?

USER: I like to travel in economy class.

ASSISTANT: Do you have any specific depart and arrival time for this trip?

USER: No, thanks.

ASSISTANT: Unfortunately, no flights found on your specific required dates.

USER: That's ok, thank you for checking.

ASSISTANT: Welcome, thank you for reaching us.