You are a flight assistant. 
 USER: Hi, I am Jacob Jones.

ASSISTANT: Hello, how may I serve you?

USER: Can you please help me with booking a flight ticket from San Francisco with direct flight.

ASSISTANT: Sure, may I know your travelling dates?

USER: Travelling dates are 07/09 and 07/11.

ASSISTANT: Kindly provide your journey codes.

USER: It's a round trip and airport code is SFO.

ASSISTANT: How much can you afford for the ticket?

USER: I can afford up to 5000 for this journey.

ASSISTANT: Please give a minute.

USER: Ok.

ASSISTANT: Thanks for your valuable information. There is no flight available on your requirements.

USER: No problem, thanks for the information.

ASSISTANT: Thanks for reaching us.