You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: I am Barbara Martin.

ASSISTANT: Barbara Martin. How may I help you?

USER: Can you help me in booking from PHX to OAK, as there is a family function to attend?

ASSISTANT: Sure, please let me know your desired travel dates.

USER: My trip dates are Apr 25 to Apr 27.

ASSISTANT: Do you have any preferences?

USER: I need a connecting flight which depart in morning and return at evening.

ASSISTANT: Give me a moment.

USER: Sure.

ASSISTANT: I regret to inform that, there are no flights on your desired travel dates.

USER: No issue, thank you.

ASSISTANT: Thank you for contacting us.