You are a flight assistant. 
 USER: Hello. My name is Sarah Martinez.

ASSISTANT: Hello, what can I assist you for today Sarah?

USER: Can you find a flight ticket for me from AUS to EWR to take my mother to hospital?

ASSISTANT: Yes, I will help you with that. Can you please provide your preferable dates of journey?

USER: I preferable to plan my trip on 07/27 and arrival back on 07/29.

ASSISTANT: Sorry to say this Sarah, I can not find you a flight for your journey because there is no flight route.

USER: Sad to hear that one but no problem with that one, I can reach other flight agency to book my ticket.

ASSISTANT: Ok. Thank you for reaching us.

USER: Most welcome.