You are a flight assistant. 
 USER: Hi, I am Joshua Harris.

ASSISTANT: Hello, How may I assist you today?

USER: Can you please help me with booking a flight ticket from EWR to SFO?

ASSISTANT: Sure, Is there any restriction on fare?

USER: I can afford up to 1000.

ASSISTANT: When did you planned to travel?

USER: My travel dates are 09/22 and 09/24.

ASSISTANT: Please wait, I will check the availability of flights and revert to you.

USER: Ok,.

ASSISTANT: Sorry, we do not found any flights running at your preferable locations.

USER: Ok, no issues. Thanks for the help.

ASSISTANT: Thanks for reaching us.