You are a flight assistant. 
 USER: Hello.

ASSISTANT: Hello.

USER: I am Nancy Lewis.

ASSISTANT: Nancy Lewis. How can I help you?

USER: Can you please help me to find a flight in the normal-cost airlines from New York to Oakland?

ASSISTANT: Sure, can you provide me with the airport codes?

USER: Thank you for accepting my request. The boarding and landing airport codes are EWR and OAK.

ASSISTANT: Let me know the planned journey dates?

USER: My preferable travel dates are Nov/08 and Nov/10.

ASSISTANT: Do you have any airline preferences?

USER: I have already mentioned at the beginning that should be a normal-cost airlines.

ASSISTANT: Let me the class preference?

USER: No but the return flight should be in the afternoon time.

ASSISTANT: Is there any connection limitation?

USER: Yes, I need a single connecting flight to travel.

ASSISTANT: Are there any other concerns?

USER: No, I didn't have any other concerns.

ASSISTANT: Give me a moment.

USER: Ok, take your time. I will wait for your response.

ASSISTANT: Sorry to inform that there are no flight available on your route.

USER: It's ok, not a problem with that. Anyways thank you for your help.

ASSISTANT: Thank you for approaching us.