You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello. How may I assist you?

USER: Will you please guide me to book a flight ticket from Phoenix on the date of June 12th?

ASSISTANT: Yes, can you tell me your airport codes?

USER: The nearest airport to my source location is PHX and the destination airport code is CLT.

ASSISTANT: Ok, can I know your return date?

USER: The return journey date is June 14th.

ASSISTANT: Do you have any other preferences?

USER: I would prefer to travel in a single connecting flight.

ASSISTANT: Give me a moment.

USER: Ok, I will wait for your response.

ASSISTANT: Sorry to inform you that there are no flights found on your requested dates.

USER: It's ok, not a problem with that.

ASSISTANT: Can I know your name?

USER: My name is Emily Anderson.

ASSISTANT: Thank you for reaching us.

USER: You are welcome.