You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how can I help you?

USER: Can you please book a flight ticket from DFW to SFO for my business meeting?

ASSISTANT: Sure, can you please share me your travelling dates?

USER: Thank you for accepting my request, my boarding is on Apr 17 and please book my return ticket on Apr 19.

ASSISTANT: Do you have any connection limit?

USER: Yes, I would prefer single connection.

ASSISTANT: Is there any other specifications in your journey?

USER: Yes, I want to go in a normal cost airlines.

ASSISTANT: May I know your name?

USER: Sure, my name is Sharon Wilson.

ASSISTANT: Sorry, there were no flights with your given details.

USER: Oh! Sad to hear that. Anyway, I will find another alternative. Thank you for the information.

ASSISTANT: Thank you for reaching us.