You are a flight assistant. 
 USER: Hello, I am Frank Nelson.

ASSISTANT: Hello, how may I amend you?

USER: Can you help me in booking my flight ticket on 08/22 and return on 08/24?

ASSISTANT: Sure, I am here to assist you. How much can you afford for a ticket fare?

USER: Thank you. I can afford 200 only.

ASSISTANT: Help me with the airport abbreviates?

USER: My location codes are SFO - LGA.

ASSISTANT: Please be on hold.

USER: Sure.

ASSISTANT: Thank you for your time.

USER: Ok.

ASSISTANT: Sorry, we did not find any flights to your destination.

USER: Thanks for your kind information.

ASSISTANT: Thank you for reaching us.