You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Nicole Hall.

ASSISTANT: How can I assist you?

USER:  I am a science student in New York university, I want to visit National Museum of Natural History for my thesis, can you help me in booking a ticket from PHX to OAK?

ASSISTANT: Sure Nicole, can I know the travel dates please?

USER: My travelling dates are 02/04 to 02/06.

ASSISTANT: Ok, wait a moment please.

USER: Sure.

ASSISTANT: Sorry Hall, there are no flights on your dates.

USER: No issue, thank you for checking.

ASSISTANT: Thank you for approaching us.