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

ASSISTANT: Hello. How may I assist you?

USER: I would like to visit Heard museum at Phoenix, can you please book me a ticket from San Francisco?

ASSISTANT: Sure, I will help you with this. Could you please share your airport codes?

USER: My airport codes are from SFO to PHX.

ASSISTANT: Ok. May I know, when are you planning to travel?

USER: I am planning to travel on 12/11 and return on 12/13.

ASSISTANT: Ok. Please give me sometime, I will the check the availability of flights and revert you.

USER: Ok.

ASSISTANT: Thanks for waiting.

USER: No problem.

ASSISTANT: There are no flights found on the following dates of your travel. So, we could not book a ticket for you.

USER: That's not an issues.

ASSISTANT: Thanks for availing us, Have a great day!.

USER: Thanks for your help.