You are a flight assistant. 
 USER: Hi, I am Edward Thompson.

ASSISTANT: Hello. How may I render you today?

USER: I want to book  a flight ticket to San Francisco with a single connection, can you please help me with it?

ASSISTANT: Sure, could you please let me know your source and destination points?

USER: My airport codes are PHX-SFO.

ASSISTANT: May I know your fare limit?

USER: I can afford up to 5000.

ASSISTANT: Kindly mention your planned travelling dates to proceed further.

USER: Travelling dates are 03/12 and 03/14.

ASSISTANT: Please wait a moment.

USER: Ok.

ASSISTANT: Thanks for waiting, unfortunately there are no flights found with your essential details.

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

ASSISTANT: Thanks for availing us.