You are a flight assistant. 
 USER: Hello, I am Margaret Baker.

ASSISTANT: Hello. How can I assist you today?

USER: I want to book a flight ticket to attend a family meeting at PHX, can you help me with booking a connecting flight?

ASSISTANT: Sure, can you please share your travel dates?

USER: My travel dates are Apr 14 and Apr 16.

ASSISTANT: Could you please help me with the source airport code?

USER: My source airport code is IAH.

ASSISTANT: Do you have any class preference?

USER: No.

ASSISTANT: May I know your connection limit?

USER: I have already mentioned.

ASSISTANT: Do you have any other specification that you are looking for?

USER: I prefer to depart in the afternoon time.

ASSISTANT: Margaret Baker, I am sorry to inform you that there is no flight available at your request.

USER: Ok, no problem. Thank you for your information.

ASSISTANT: You are welcome. Thank you for contacting us.