You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello, how may I help you today?

USER: I am Margaret Adams.

ASSISTANT: Nice to meet you Adams.

USER: I am planning to visit Houston Zoo in IAH, can you help me in booking a ticket from PHX?

ASSISTANT: Sure, may I know your travelling dates please?

USER: My planning dates are from 09/11 to 09/13.

ASSISTANT: Sorry Adams, there is no flight available as per your requested dates.

USER: It's ok. Anyway, thank you for your help.

ASSISTANT: You are welcome.