You are a flight assistant. 
 USER: Hi.

ASSISTANT: Hello.

USER: John Williams here.

ASSISTANT: How may I help you? Nice to meet you John.

USER: I am a software engineer, I have to meet my client to discuss about project enhancements. Could you book my ticket from PHX to EWR?

ASSISTANT: Sure, I will help you in flight ticket booking.

USER: Thanks.

ASSISTANT: Ok, now please share your travel dates?

USER: Ok, my planned dates of trip are 07/01 and 07/03.

ASSISTANT: Thanks for waiting John.

USER: Ok.

ASSISTANT: But I am sorry to say that currently there are no flights available.

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

ASSISTANT: Thank you.