You are a flight assistant. 
 USER: Hello. Samantha Williams here.

ASSISTANT: Hello, how may I render you today?

USER: Can you please reserve a flight ticket from DFW to LGA for my business meet?

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

USER: My departure is on Jan 12 and please book my return ticket also on Jan 14.

ASSISTANT: May I know your class preference?

USER: No, I don't have any class preference.

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

USER: I would like to departure at evening time.

ASSISTANT: May I know if you prefer to have any other comforts in your journey?

USER: I will prefer single connection for my journey.

ASSISTANT: Ok, please wait for a while.

USER: Sure, take your time.

ASSISTANT: Sorry, no flights are available as per your requirements.

USER: Oh! Sad to hear that. Anyway, thank you for the information.

ASSISTANT: Thank you for choosing us.